SB2026073019 - Incorrect Behavior Order in guzzle
Published: July 30, 2026
Security Bulletin ID
SB2026073019
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect Behavior Order: Validate Before Canonicalize (CVE-ID: CVE-2026-59883)
CWE-ID: CWE-180 - Incorrect Behavior Order: Validate Before Canonicalize
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to noncanonical cookie domain keeps subdomain scope. A remote attacker can disclose session cookies to attacker-controlled subdomains or inject malicious cookies on the system.
Remediation
Install update from vendor's website.